semoga membantu yaaaa
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semoga membantu yaaaa
f(a) = -13
f(a) = 3x + 5 = -13
f(a) = 3x = -13 - 5
f(a) = 3x = -18
f(a) = x = -18 / 3
f(a) = x = -6
jadi , nilai a adalah -6